Chicago O'Hare International (ORD) on-time performance, September 2026
39,750 scheduled airline departures from Chicago in September 2026, 66.9% of them on time. Measured from FAA departure data, updated every morning.
On time, day by day
Share of departures within 15 minutes of schedule, by day. Light bars show each day's departures for context. Worst day: Saturday 19 September at 30.1%. Best: Monday 14 September at 85.0%.
Airlines at ORD, ranked by on-time share
Scheduled airlines with at least 30 departures from ORD in the month. Regional partners (SkyWest, Republic, Envoy and the like) appear under their own names; fractional and charter operators are in the totals but not listed.
| Airline | Departures | On time | 45+ min late | Avg delay (min) |
|---|---|---|---|---|
| Federal Express FDX | 136 | 100.0% | 0.0% | -32.1 |
| Air China Cargo CAO | 57 | 98.2% | 0.0% | -30.2 |
| Copa Airlines CMP | 51 | 94.1% | 2.0% | -9.2 |
| Aeromexico AMX | 59 | 89.8% | 3.4% | 0.3 |
| Volaris VOI | 149 | 88.6% | 6.7% | -3.9 |
| China Cargo Airlines CKK | 53 | 86.8% | 1.9% | -7.1 |
| CSG CSG | 40 | 85.0% | 2.5% | -23.5 |
| Korean Air KAL | 88 | 84.1% | 8.0% | -4.8 |
| Etihad Airways ETD | 60 | 76.7% | 5.0% | 7.1 |
| Icelandair ICE | 47 | 76.6% | 6.4% | 6.1 |
| Republic Airways RPA | 2,551 | 75.5% | 13.1% | 11.8 |
| Envoy Air ENY | 4,783 | 74.0% | 15.2% | 12.6 |
| JetBlue JBU | 173 | 74.0% | 18.5% | 12.0 |
| Japan Airlines Domestic JAL | 60 | 73.3% | 8.3% | 14.0 |
| Alaska Airlines ASA | 261 | 73.2% | 16.1% | 18.7 |
| United Parcel Service UPS | 126 | 72.2% | 14.3% | 11.7 |
| Key Lime Air LYM | 106 | 71.7% | 13.2% | 8.2 |
| Emirates UAE | 60 | 71.7% | 13.3% | 6.6 |
| Frontier Airlines FFT | 323 | 71.2% | 18.0% | 21.3 |
| Cargolux CLX | 72 | 70.8% | 6.9% | 4.2 |
| Air France AFR | 61 | 70.5% | 14.8% | 10.1 |
| Delta Air Lines DAL | 1,097 | 69.9% | 18.6% | 16.6 |
| Jazz (Air Canada Express) JZA | 101 | 68.3% | 20.8% | 21.9 |
| EVA Air EVA | 81 | 67.9% | 18.5% | 25.6 |
| United Airlines UAL | 11,128 | 66.7% | 19.3% | 22.7 |
| SkyWest SKW | 6,949 | 65.4% | 19.3% | 22.9 |
| All Nippon Airways ANA | 89 | 65.2% | 15.7% | 17.4 |
| Aeroenlaces Nacionales VIV | 71 | 64.8% | 11.3% | 9.9 |
| Swissair SWR | 59 | 62.7% | 3.4% | 12.9 |
| American Airlines AAL | 6,749 | 62.1% | 23.7% | 26.2 |
| China Airlines CAL | 61 | 60.7% | 27.9% | 30.7 |
| Endeavor Air EDV | 91 | 60.4% | 22.0% | 24.4 |
| Cathay Pacific CPA | 63 | 60.3% | 30.2% | 49.0 |
| GoJet Airlines GJS | 1,973 | 59.4% | 28.0% | 35.5 |
| Lufthansa DLH | 115 | 58.3% | 9.6% | 13.0 |
| LOT Polish Airlines LOT | 62 | 58.1% | 12.9% | 19.1 |
| Air Canada ACA | 184 | 57.6% | 28.3% | 35.5 |
| Aer Lingus EIN | 61 | 57.4% | 14.8% | 21.2 |
| Corporate Flight Management VTE | 269 | 56.5% | 30.1% | 43.1 |
| Turkish Airlines THY | 81 | 55.6% | 25.9% | 28.2 |
| Qatar Airways QTR | 96 | 53.1% | 25.0% | 27.6 |
| KLM KLM | 30 | 50.0% | 20.0% | 22.2 |
| British Airways BAW | 79 | 49.4% | 15.2% | 21.1 |
| Alpine Air Chile AIH | 34 | 47.1% | 23.5% | 18.5 |
| Atlas Air GTI | 197 | 44.7% | 29.9% | 38.5 |
| Kalitta Air CKS | 158 | 38.6% | 43.7% | 49.1 |
| Iberia IBE | 30 | 20.0% | 46.7% | 48.1 |
Destinations with the longest delays
Routes from ORD with at least 20 departures, by average departure delay.
| To | Flights | On time | Avg delay |
|---|---|---|---|
| GRU Sao Paulo | 30 | 50.0% | 66.4 |
| SUX Sioux City | 30 | 43.3% | 63.7 |
| IRK Kirksville | 29 | 44.8% | 58.1 |
| KMBL KMBL | 79 | 54.4% | 51.7 |
| BOS Boston | 730 | 47.9% | 45.8 |
| SLN Salina | 30 | 63.3% | 44.6 |
| CGI Cape Girardeau | 30 | 56.7% | 42.3 |
| ANC Anchorage | 266 | 51.1% | 39.8 |
| DOH Doha | 47 | 44.7% | 39.8 |
| MAD Madrid | 59 | 39.0% | 36.3 |
Busiest destinations
The ten routes with the most departures from ORD this month.
| To | Flights | On time | Avg delay |
|---|---|---|---|
| LGA New York | 972 | 63.8% | 25.6 |
| BOS Boston | 730 | 47.9% | 45.8 |
| LAX Los Angeles | 725 | 70.3% | 19.4 |
| DFW Dallas-Fort Worth | 709 | 69.0% | 19.8 |
| DCA Washington | 687 | 68.9% | 20.6 |
| ATL Atlanta | 640 | 69.8% | 19.7 |
| DEN Denver | 633 | 70.1% | 16.8 |
| IAH Houston | 594 | 68.9% | 18.7 |
| SFO San Francisco | 586 | 65.4% | 21.6 |
| MSP Minneapolis | 585 | 63.6% | 22.5 |
Other months for ORD
Airline pages for September 2026
How we measure
On time means the aircraft took off within 15 minutes of its scheduled departure, after subtracting the departure airport's normal taxi time at ORD (FAA SWIM reports wheels-off, not push-back, so the median taxi time of the last 30 days is taken off every flight first). Average delay is the mean of that taxi-adjusted delay over all departures; early departures count as negative minutes, so an operator that routinely leaves early can show a negative average. 45+ min late is the share of departures that left 45 minutes or more behind schedule, the point at which most connections are at risk.
Scope: scheduled airlines only, the same set as the monthly State of the Sky report (operators with published routes; private, fractional and charter operators are left out), so the two publications give the same numbers for the same month. Departures are counted by scheduled day (UTC). Each day's flights are rolled up overnight and published the next morning; the newest day keeps filling in for a day or two and is only shown once it is substantially complete. Figures can differ by a few tenths of a point from the State of the Sky report for the same month: that report is frozen on the 2nd of the following month, while these pages are rebuilt from the live rollup, which recomputes each airport's taxi baseline nightly and re-rolls the last week of the month as late departure times arrive (September 2026 at SFO: 16,398 departures in both, 69.2% on time here against 69.5% in the report).
Source: FAA System Wide Information Management (SWIM) flight plans and departure times, processed by PlaneTrack. Free to quote with credit to PlaneTrack (CC BY 4.0).